Panasonic JB-3300 Technical Manual page 60

Is
* AENCPU
OK?
No DMA Circuit
™ (8237A~5)
""AENCPU"
II. 5.6
{
No
Address Bus @-i Address Latch
II. 5.4
___
~| ROM Chip Select
~| Circuit
II. 5.5
e| Replace BIOS-ROM
II. 5.11
__ Refresh Timer
~| Circuit (8253-5) LL
we DMA Circuit
(8237A-5)
15us r] II. 5.6
DREQO C
*DACKO U a
No ge} RAM Circuit
X:4P-15
It. 5.5
No Interrupt
| Controller (8259A
X:1J-18 ( ) II. 5.8
No p-| NMI Circuit
X:1J-17 II. 5.4
— MPU Data Bus
II. 5.3 to 4
Figure 9-6 (2/2)